Distributions To Unitholders (Details) - $ / shares		3 Months Ended								12 Months Ended
	Feb. 13, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018
Common units
Distribution paid per unit					$ 0.1500	$ 0.1500	$ 0.1500	$ 0.4508	$ 0.4508
Class B preferred units
Distribution paid per unit					$ 0.28225	$ 0.28225	$ 0.28225	$ 0.2258	$ 0.28225
Aggregate distribution of units										310,009
Class C preferred units
Paid-in-kind units distributed		1,039,314	1,007,820	939,327
Class C preferred units | Subsequent event
Class C Preferred Units Payable In Class C Preferred PIK Units Percentage	100.00%